Temperature-indicator.



v w. s. BHITTWM TEMPERATURE iNDiCATOR.

APPLICATION FILED DEC.4,1917.

Patented Aug. 20, 1918.

4 27 4 A TQRNEYS maomu-musfrmmmmn balls-o.

m it may cm m r .unown the; l, l nL'rsu S. Burr'rm, a citizen of the lilnited Moles, residing at Vallejo, "he counts of Helene and State of Culiloroie, have invented new and useful liu rovenieuts inv .11 v1,upermturelndicators, oi which the ifollowiuu- :1 specification.

A This invention relates to a temperature irulicetor. I

Une ot' the objects of the pro-sent invention is to'provide :1 temperature indicator pertiiculurly adapted for use in connection with automobiles to visibly indicate thetemperw ture of circulating Water through the imlerszuid radiator, Another object of: the invention is to provide a device ot the character desc ed which is provided with :1, temper cure in icetor adopted to be posh tioued directly on the dashboard of on automobile, and. in conjunction therewith Jesus for actuating the some which may be couuected with the hose interposed between the engine and the radiator or in any other couwuiiem; Whit passage of the circulating sys- 155% tern. Further objects Will hereinette'r up peer, i i

The invention consists of the ports and the construction and combination of parts as herciue'tter more fully described and 6a claimed having reference to the recompeuyin wings, in Wh1ch- Figure l is a side elevation of on automobile, portly broken sway, showing the eppl'l on of the invention o detail View, portly in section, the temperature indicator end its ctod actuating mechanism.

' r the drawings in. detail, A. in-

ot astonderd form of:

,c, the return manifold 1e jacket vmterfdischerges,

suitable construction, end l .ole hose connection between the l i3 and the re diator. The hose pro the present instance consists of two l and 4;" and udopted to be inter-' bcbweeu sued sections is a nipple 5 is provided with u surrounding en- 'l er *1? which. is adopted to receive :ouid WllOSG thermal properties are iuost suitable tor the use here shown.

A1 ye olaced directly on the dashboord l' l the vehicle is a temperature indicetor 8. This temperature indicator consists oil? stmiclerd form of pressure gageythe lilies pressure dial being removed and specification of hetters ibateilt.

Petemted lue c 23th llll llbq Zt ecember fl, 1817. berm] No. 365,291.

a temperature indicating dial 9 being substituted therefor. Connecting the pressure with the annular chamber 6 is a copper tube 1.9, and surrounding said tube and also the annular chamber 6 is an insulating" materiol 11 which. may consist of asbestos or the like. r I

in, actual question, with the parts connected'us shown in Fig. 1, it is only uee'ese5 4 my to fill the chamber 6, tube and connected pressure gage with a suitable fluid or liquid, for insto'uce alcohol, carebeing' taken that the parts are completely filled and then sealed. Operation of the engine under such conditions naturally heats the circulating water end the temperature thus} created is transmitted to the liquid in the chamber 6 which, of course, expands in. pm-

portion to the increase in temperature. The

pressure thus produced by the expansion of the liquid extends the pressure gage and thereby moves the hand 12' which moves over the dial and thereby visibly indicates the temperature.

It is well known that there is s definite re'lut on between the pressure abdtemperetur'e produced and that these follow definite laws, depending upon the thermal properties of the fluid or liquid employed. Thus it. the, position of the hand on the died of the gage 9 is marked succeeding to the tempereture of the. liquid ortluid employed utethe time of filling or charging, say 60 Fahrenheit, then any subsequent change in tempera-- ture Within the chamber 6 Will cause. a dellmite change of pressure and Will thereby expend the tube of the gage and swing the band a definite distance on the temperature 'scelsrirovided. lit can, therefore, be seen how- Wu-lotions in pressure will instantly register readings upon the gage 9. Y

The present invention is particularly adopted, tor the use here shown, first, be cause it, permits the tempersture gage to be placed on the dashboard Where it mey be conveniently observed at all times by the operator and, secondly, because it maybe attached to any standard car in use, as prom lzicslly all cars are equipped With a, hose connection, as shown so; l. I While the nipple or sleeve 5 is shown be interposed between-the hose sections l end 4*", 1 Wish it understood that it may be eou= nected with the manifold 2 or at any other convenient point Where the circulating Water passes and also that the materials and finish of the several parts employed may be such as the experience and judgment of the manu faeturer may dictate.

Having thus described my invention, What I claim and desire to secure by Letters Patent is 1. The combination with the jacket sur rounding the cylinders and the radiator on an automobile. of a hose connecting the.

around adapted to. contain an expansible liquid, a temperature dial on the dashboard of the automobile, a movable hand on the dial, and means actuated by expans on of the liquid for moving the hand, said means being connected to said chamber by a tube.

2. The combination with the jacket surrounding the cylinders and the radiator on an automobile, of a hose connecting the jacket With the radiator to permit Water to circulate therethrough, a nipple member in the hose through which the water passes, said nipple having a chamber formed therein, a temperature indicating gage on the dashboard of the automobile, a tube connecting the gage with the chamber on the nipple, and an expansible liquid forming a filler for the gage, the tube and the chamber to operate the gage according to the changes of the temperature of said liquid.

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses.-

. WALTER BRITTIN. Witnesses H. M. LOVELACE, WniLL-mr GUIHL. 

